:root{
  --bg:#f3efe6; --surface:#fbf9f4; --ink:#22262a; --muted:#6c6f70; --rule:#ddd5c6;
  --accent:#2c5d63; --accent-soft:#e1eae8; --link:#2c5d63; --mark:#2c5d63; --mark-ink:#f3efe6;
  --serif:"Noto Serif TC","Songti TC","PMingLiU",serif;
  --sans:"Noto Sans TC","PingFang TC","Microsoft JhengHei",system-ui,sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#111719; --surface:#182023; --ink:#e4e0d6; --muted:#9aa19f; --rule:#2c3639;
    --accent:#8ec3c0; --accent-soft:#1f2f31; --link:#9fd0cc; --mark:#8ec3c0; --mark-ink:#111719;
  }
}
:root[data-theme="dark"]{
  --bg:#111719; --surface:#182023; --ink:#e4e0d6; --muted:#9aa19f; --rule:#2c3639;
  --accent:#8ec3c0; --accent-soft:#1f2f31; --link:#9fd0cc; --mark:#8ec3c0; --mark-ink:#111719;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.85;overflow-wrap:anywhere}
a{color:var(--link);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
img{max-width:100%;height:auto}
.wrap{max-width:860px;margin:0 auto;padding:0 16px}

/* header */
header.site{border-bottom:1px solid var(--rule);background:var(--bg);position:sticky;top:0;z-index:5}
.bar{display:flex;align-items:center;justify-content:space-between;padding-top:14px}
.brand{font-family:var(--serif);font-weight:700;font-size:1.25rem;letter-spacing:.12em;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:10px}
.mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--mark);color:var(--mark-ink);font-size:.95rem;letter-spacing:0}
.theme{background:none;border:1px solid var(--rule);color:var(--ink);border-radius:999px;width:36px;height:36px;cursor:pointer;font-size:1.25rem;line-height:1}
.mainnav{display:flex;gap:4px;overflow-x:auto;padding-top:6px;padding-bottom:0;scrollbar-width:none}
.mainnav::-webkit-scrollbar{display:none}
.mainnav a{flex:none;padding:8px 12px 10px;color:var(--muted);text-decoration:none;border-bottom:2px solid transparent;font-size:.95rem}
.mainnav a:hover{color:var(--ink)}
.mainnav a[aria-current],.mainnav a.on{color:var(--ink);border-bottom-color:var(--accent)}

/* hero */
.hero{padding:44px 0 18px}
.hero h1{font-family:var(--serif);font-weight:700;font-size:clamp(1.7rem,4.5vw,2.4rem);line-height:1.3;margin:0;letter-spacing:.06em}
.hero .lead{color:var(--muted);margin:10px 0 0;max-width:40em}
.hero.home{padding:64px 0 28px}
.hero.home h1{font-size:clamp(2.6rem,9vw,4.2rem);letter-spacing:.2em}

.subnav{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 10px}
.subnav a{padding:4px 12px;border:1px solid var(--rule);border-radius:999px;font-size:.88rem;text-decoration:none;color:var(--ink);background:var(--surface)}
.subnav a[aria-current]{background:var(--accent);border-color:var(--accent);color:var(--bg)}

/* content */
.content{padding-bottom:56px}
.sec{margin:36px 0}
.sec>h2,.chapter>h2,h2.divider{font-family:var(--serif);font-size:1.3rem;font-weight:600;margin:0 0 14px;padding-bottom:8px;border-bottom:1px solid var(--rule);letter-spacing:.04em}
h2.divider{margin-top:56px}
h3{font-family:var(--serif);font-weight:600;font-size:1.08rem;margin:22px 0 8px}
.block{margin:0 0 14px}
.block ul{padding-left:1.3em;margin:6px 0}
.block li{margin:2px 0}
.muted{color:var(--muted);font-size:.92rem}
.note{color:var(--muted);font-size:.92rem;border-left:3px solid var(--rule);padding-left:12px;margin:0 0 14px}
.more{font-size:.92rem}

.prose{font-family:var(--serif);font-size:1.06rem;line-height:2.05;max-width:36em}

.toc{display:flex;flex-wrap:wrap;gap:6px 14px;padding:14px 16px;background:var(--surface);border:1px solid var(--rule);border-radius:10px;margin:18px 0 6px;font-size:.92rem}
.toc a{text-decoration:none}
.toc a:hover{text-decoration:underline}

.chars{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,360px),1fr));gap:14px}
.char{background:var(--surface);border:1px solid var(--rule);border-radius:12px;padding:16px 18px;scroll-margin-top:120px}
.char h3{margin:0 0 6px;font-size:1.15rem;color:var(--accent)}
.char-body{font-size:.95rem}
.char-body ul{padding-left:1.1em}

.chapter{margin:44px 0;scroll-margin-top:110px}
.chapter h2 .en{font-family:var(--sans);font-size:.78rem;font-weight:500;letter-spacing:.08em;color:var(--accent);background:var(--accent-soft);padding:2px 8px;border-radius:4px;margin-right:6px;vertical-align:middle}
.chapter h2 .src{font-family:var(--sans);font-size:.78rem;font-weight:400;float:right;margin-top:6px}
.profile{background:var(--surface);border:1px solid var(--rule);border-radius:12px;padding:16px 18px;margin:22px 0}
.sec[id],h2[id]{scroll-margin-top:110px}

.linklist{padding-left:1.2em}
.linklist li{margin:6px 0}

.video{position:relative;aspect-ratio:16/9;max-width:560px;margin:10px 0 16px;border-radius:10px;overflow:hidden;background:#000}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

.img-missing{display:inline-flex;align-items:center;justify-content:center;min-width:180px;min-height:90px;padding:10px 14px;margin:6px 0;border:1px dashed var(--rule);border-radius:8px;color:var(--muted);font-size:.8rem;background:var(--surface)}

/* home cards */
.home-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr));gap:12px;margin:8px 0 10px}
.card{display:block;padding:18px;border:1px solid var(--rule);border-radius:12px;background:var(--surface);text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--accent);transform:translateY(-2px)}
.card .k{display:inline-block;font-size:.75rem;color:var(--accent);letter-spacing:.12em;margin-bottom:4px}
.card b{display:block;font-family:var(--serif);font-size:1.12rem;font-weight:600}
.card small{display:block;color:var(--muted);font-size:.85rem;margin-top:4px;line-height:1.6}

footer.site{border-top:1px solid var(--rule);color:var(--muted);font-size:.88rem;padding:24px 0 36px}
footer.site p{margin:0 0 8px}
.small{font-size:.82rem}

@media (max-width:560px){
  .hero{padding:30px 0 12px}
  .hero.home{padding:40px 0 20px}
  .chapter h2 .src{float:none;display:block;margin-top:4px}
}